Support for taking full snapshots from 'dart', not just 'dart_bootstrap'.

runtime/vm/benchmark_test.cc

Index: runtime/vm/benchmark_test.cc
diff --git a/runtime/vm/benchmark_test.cc b/runtime/vm/benchmark_test.cc
index 8e4975b24d980190c01c7254a82b9fbe4505d470..1d56af7da986d7237c7540dcab0d39d5bf299671 100644
--- a/runtime/vm/benchmark_test.cc
+++ b/runtime/vm/benchmark_test.cc
@@ -528,8 +528,7 @@ BENCHMARK_SIZE(CoreSnapshotSize) {
                             &vm_isolate_snapshot_buffer,
                             &isolate_snapshot_buffer,
                             &malloc_allocator,
-                            NULL, /* instructions_writer */
-                            true /* vm_isolate_is_symbolic */);
+                            NULL /* instructions_writer */);
   writer.WriteFullSnapshot();
   const Snapshot* snapshot = Snapshot::SetupFromBuffer(isolate_snapshot_buffer);
   ASSERT(snapshot->kind() == Snapshot::kCore);
@@ -565,8 +564,7 @@ BENCHMARK_SIZE(StandaloneSnapshotSize) {
                             &vm_isolate_snapshot_buffer,
                             &isolate_snapshot_buffer,
                             &malloc_allocator,
-                            NULL, /* instructions_writer */
-                            true /* vm_isolate_is_symbolic */);
+                            NULL /* instructions_writer */);
   writer.WriteFullSnapshot();
   const Snapshot* snapshot = Snapshot::SetupFromBuffer(isolate_snapshot_buffer);
   ASSERT(snapshot->kind() == Snapshot::kCore);